Rotary engine



(No Model.) 2 sheets-sheet v1.

A. D. BAKER. ROTARY ENGINE. No. 440,125. a Patented N'o-v. 11,1890.

(No Model.) 2 sheets-sheet 2. A. D. BAKER.

ROTARY ENGINE.

Patented NOV. 1'1, 1890.

zam

UNITED STATES ABNER D. BAKnaor1 swAN'roN, omo.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 440,125, dated November 11, 1890. Application filed April 17,1890. Serial No. 348,365. (lilo model.)

To all whom it may concern:

Be it known that I, ABNER D. BAKER, a citizen of the United States, residing at Swanton, in the county of Fulton and State of Ohio, have invented a new and useful Rotary Engine, of which the following is a specication.

This invention relates to rotary engines; and it has for its object to constructa concentric rotary engine which may utilize iiuid pressure of any description in such a manner as will gain the maximum amount of power in proportion to the energy expended.

A further object of my invention is to construct a motor of this class which shall be simple, durable, and efficient in operation.

lVith these ends in view the invention consists in the improved construction, arrangement, and combination of parts, which will be hereinafter fully described, and particularl y pointed out in the claims.

In the drawings, Figure lis a side elevation of my improved. engine, with one side of the casing removed so as to expose the interior construction. Fig. 2 is a vertical sectional View taken longitudinally through the shaft of the engine on the line 2 2 in Fig. l. Fig. 3 is a side elevation showing the inner face of one of the cylinder-heads. Fig. 4 is a side elevation of the engine with one of the shaftbearings detached. Fig. 5 is a detail end view of the rotary piston-head. Fig. 6 is a detail longitudinal sectional view showin g the construction of said rotary piston-head or abutment. Fig. 7 is a detail view showing the rotary piston with the sliding piston in contact with the packing-strip of the casing between the inlet and exhaust ports. Fig. 8 is a detail view showing the guide-arms of the rotary piston-head and the piston or valve between the said guide-arms.

Like numerals of reference indicate like parts in all the figures.

The casing of my improved rotary engine is composed of the shell l,having cylindrical bore 2, the heads or ends 3 3 of which are secured to the said shell or casing by means of stud-bolts 4 or in any suitable manner. The heads or ends 3 3 are provided with cylindrical laterally-extending sleeves 5 5,

which are eccentric to the bore of the cylinder. Suitably bolted to the outer ends of said sleeve are the bearing-blocks 6, having anges 7 to receive the securing-bolts. The bearing-blocks 6 have bearings for the shaft 8, which is arranged concentrically with relation to the cylindrical bore of the shell..

9 designates the revolving piston-head, which consists of a cylindrical shell or body 10, having laterally-extending sleeves or tubular arms ll, which are journaled between the sleeves 5 and the bearing-blocks G. Eccentric bearing rings or bushings l2 are interposed between the tubular arms 11 'and the sleeves 5, and are secured. in position by means of set-screws 13, extending through the flanges 7 of the bearing-blocks 6. These eccentric bearing rings might with equal effect be arranged between the tubular arms ll and the bearing-blocks 6, or two sets of said eccentric bearing-sleeves might be used on opposite sides of the tubular arms ll. The function of said eccentric bearing-sleeves is to admit of the adjustment of the revolving piston-head to compensate for wear upon the latter, such adjustment being effected by partially turning the bearing rings or sleeves, thereby raising the revolving piston head when necessary to effect the desired adjustment.

The revolving piston-head is pro vided with guide arms 14, extending diametrically through the said piston-head, and provided with a roller-joint 15, fitting a cylindrical recess 16 in one side of the revolving pistonhead. The arms 14e are connected by means of a screw 1S, which may be tightened whenever it shall be necessary to compensate for wear upon-the piston-plate 19. The latter, which is fitted between the guide-arms 14, is keyed or mounted securely upon the shaft 8, and it is provided on the opposite side of said shaft with a weight or counter-balance 20. The outer end of the piston-plate 19 is at all times in contact with the interior surface of the casing of the machine, and its outer edge is provided with a groove 2l, in which is seated a packing-strip 22, which is forced outwardly into contact with the bore of the casing by the action of suitably-arranged coiled springs 23.A The end of the piston-plate is likewise grooved, as at 24, and provided with packing-strips 25, which are forced outwardly into contact with the sides of the casing by means of coiled springs 26. A packing-strip 27, to bear against the side of the piston-plate, is also seated in a suitable groove in the inner side of one of the guide-arms 14, as will be seen in Fig. l of the drawings.

The revolving piston-head is, as above described, arranged eccentrically in the casing, and is at all times in contact with the shell of the casing at one point. At this contactpoint the shell is provided with a groove 28, in which is seated a packing-strip 29, which is held in contact with the rotary piston-head by means of coiled springs 30, thereby making a steam-tight joint at the point of contact.

The heads or ends 3 3 of the casing are provided on their inner sides with annular grooves 3l, which are concentric with the revolving piston-head. Said grooves' are slightly inside the periphery of the said revolving piston-head, and in the said grooves are placed packing-rings 32, which by the action of springs 33 are held in contact with the said revolving piston-head, so as to effect Steam-tight joints. The packing-rings 32 are so arranged as to lap slightly over the packing-strips 25 in the ends of the piston-plate 19. At the point where the revolving pistonhead is in contact with the cylindrical shell of the casing the packing-rings 32 are discontinued, and the ends of the casing are provided with radial grooves 34, in which packing-strips 35 are placed, said packing-strips being actuated by coiled springs 36 to hold them in contact with the ends of the revolving piston-head.

37 designates the steam-chest, which consists of a cylindrical chamber formed in one side of the shell or casing and having the steam-inlet 3S. One end of the steam-chest has a bearing -for a rock-shaft 39, over the outer end of which is arranged a packinggland 40 to form a steam-tight joint. The inner end of the rock-shaft 39 carries the oscillating valve 4l, and the outer end of said rock-shaft has a crank or Wrist pin 42, which is connected by a pitman 43 with a similar crank 44 upon one end of the main shaft 8 of the engine. The cranks 42 and 44 are mounted adjustably upon their respective shafts by means of set-screws 45. It will thus be seen that the crank 42 may be readily adjusted to so adjust the oscillating valve 4l as to cause the cut-off to be readily controlled and to cause said cut-off to take place at any desired point which the piston may occupy in the cylinder. A steam-port 47 connects the steamchamber 37 with the casing on one side of the contact-point between said casing and the revolving piston-head. An exhaust-port 48 is formed in the casing on the opposite side of said contact-point. Said exhaust-port is at all times open for the purpose of preventing back-pressure.

From the foregoing description, taken in connection with the drawings hereto annexed, the advantages of my invention will be readily understood by those skilled in the art to which it appertains.

The general construction of my improved rotary engine is simple and inexpensive, and it is of such a nature as to cause the greatest possible amount of power to be derived from the least expenditure of energy.

The parts of the engine are so constructed and put together as to insure steam-tight joints.

The wear upon various parts of the engine may be very readily compensated for by means of the eccentric sleeves orrings l2 and the guide-arms 14, which latter may be adjusted so as to cause their lower ends to clamp the piston-plate with any desired degree of pressure.

The mechanism for controlling the admission rof steam is simple and certain in its operation and may be readily adjusted in a manner described, so as to cause the cut-off to take place at any desired point of the operation of the machine.

Having thus described my invention, I claiml. In a rotary engine, a concentric counterbalanced piston-plate arranged to revolve in the cylindrical casing, in combination with the eccentrically-arranged rotary piston-head having the guide-arms for said piston-plate, said guide-arms being connected with the rotary piston-head by means of a roller-joint, as herein set forth.

2. In a rotary engine, the combination,with the casing, of the eccentrically-arranged rotary piston-head, the guide-arms connected With said piston-head by means of a rollerjoint, the clamping-screw connecting the outer ends of said guide-arms, and the pistonplate mounted between the latter and secured upon a shaft concentric in the casing, substantially as set forth.

3. In a rotary engine, the combination of the casing, the rotary piston-head having laterally-extending sleeves or tubular arms, the bearings for said arms formed eccentrically in the sides of the casing, and the eccentric bearing rings or bushings mounted adjustably in the ends of the casing, substantially as and for the purpose set forth.

4. In a rotary engine, the combination of the concentric piston-plate, the eccentric rotary piston-head, the guide-arms mounted in the latter by means of the roller-joint, and the counter-weight upon the piston-plate, substantially as set forth.

5. In a rotary engine, the combination of the casing-plate, the eccentric rotary pistonhead, the guide-arms mounted in the latter IOO IIO

by means of the roller-joint, the oounter- In testimony that I claim the foregoing as Weight upon the piston-plate, the steam inlet my own I have hereto aiixed my signature in 1o and exhaust ports, the Cylindrical steam-chest, presence of two Witnesses.

the oscillating valve mounted in the latter,

5 and the pitman connecting a crank upon the ABNER D. BAKER.

main shaft with a crank mounted adj ustably Witnesses: upon the oscillating Valve-stem, substantially AQUILLA PRICE,

as and for the purpose set forth. FRANK S. HALL. 

